What's the difference?
Big sedans are not in vogue at the moment and huge luxury sedans were on the way down before the humble Commodore and Falcon departed the upper end of the sales charts. The Germans, who have always done a spectacular job of these flagship sedans, cheerfully persist with these cars.
Absolutely loaded with fascinating technology that bleeds its way down to the more mainstream models, they represent the zenith of the brand's innovation and style. The A8 is certainly that.
What it isn't, is particularly sporty, but after two years since its launch, V8 power has reached the fourth-generation super-sedan to deliver the latest iteration of the iconic S8.
As a child, my parents - who aren't car people - would see a Jaguar and point. It didn't matter if it was an XJ, Daimler Double Six or a Mark II, there was a great deal of mystique around these bastions of Britishness. It also didn't matter that these weren't necessarily good cars. The Seventies and Eighties saw the brand slide into a funk while being passed between owners like hot potatoes.
Somehow, the brand survived its brush with Ford's useless Premier Automotive Group strategy which only came good towards the end as Jaguar's management woke up and put in place a change in direction that produced the Ian Callum-designed XF. Riding high on that design, Jaguar then promptly introduced the very pretty Jaguar XJ.
It has been on sale for ages, but with the addition of a few bits and bobs to stay competitive, it's as compelling as ever. Most importantly, the performance-focused R has kept its unique supercharged V8.
The S8's existence is a source of joy for me because it's not a huge SUV. Yes, it's a huge sedan but it's a reminder that the technological flagship is alive and well, at least in Germany. And the important thing about these cars is the way the toys filter down through the rest of the range. That used to take years but we're seeing this cool stuff a lot more quickly, right down to the A1.
The S8 punches, and punches hard in this rarefied part of an already shrunken section of the market - the twin-turbo V8 matches its German rivals, it's lighter and it's as well-stacked as any of the three. What it doesn't do, however, is shout about itself the way the other two do. It's the incognito choice.
It might be old and facing German competition bursting with advanced technology, but the XJR is still a car you can buy with heart and head. But mostly your heart. It goes like stink, has a much better interior than the Quattroporte and is more interesting than just about anything this big or this grand.
It's also a better car than the Maserati Quattroporte if you want to get on with the driving yourself and is far prettier than the Porsche Panamera. It's a wonderful thing and even more wonderful that Jaguar continues to build it. Long live that supercharged V8 and the XJ is a great home for it.